JavaScript window.find（）不选择搜索词 [英] JavaScript window.find() does not select search term
问题描述
当我尝试传递遍布几个块元素的文本时，window.find方法开始工作：
HTML ：
<！DOCTYPE html>
< html>
< head>
< meta charset = utf-8 />
< / head>
< body>
< p>搜寻我< / p>< b>我可以回答< / b>
< / body>
< / html>
JavaScript ：
window.find（meI could be）;
或者：
str =me;
str + =\\\
;
str + =我可能是t;
window.find（str）;
当 编辑： 我可以使它更简单吗？ （更好）？ 注意：没有jQuery（只有Raw JS）。 < p> 元素存在于搜索词语之间。
最终结果应该是页面文本中的GUI选择，我不想搜索它是否存在。
注意：我无法更改（例如更改为内联显示）。
这是我在@Alexey Lebedev的评论后尝试，但它也发现脚本（标签文本）：
$ b $ pre $ 函数nativeTreeWalker（startNode）{
var walker = document.createTreeWalker（
startNode ，
NodeFilter.SHOW_TEXT，
null，
false
）;
var node;
var textNodesV = [];
var textNodes = [];
node = walker.nextNode（）; （节点）{
if（node.nodeValue.trim（））{
textNodes.push（node）;
while（node）
textNodesV.push（node.nodeValue）;
//console.log (node.nodeValue）;
}
node = walker.nextNode（）;
}
return [textNodes，textNodesV];
}
var result = nativeTreeWalker（document.body）;
var textNodes = result [0];
var textNodesV = result [1];
var param =Praragraph.Test 3 Praragr;
paramArr = param.split（/（？= [\S]）（？！\s）（？= [\W]）（？= [\S]）/ g）;
//为（i = 0; i< paramArr.length-1; i ++）{
paramArr [i] = paramArr [i] + paramArr [i + 1]修正分割PARAM
.charAt（0）;
paramArr [i + 1] = paramArr [i + 1] .substring（1，paramArr [i + 1] .length）;
}
//修正最后一个元素PARAM
if（paramArr [paramArr.length-1] ===）{
paramArr.splice（paramArr.length-1， 1）;
}
//console.log(paramArr）;
var startNode，startOffset，sFound = false，
endNode，endOffset; （j = 0; j
的
（i = 0; i
if（pos！= -1）{
if（！sFound）{
startNode = textNodes [j];
startOffset = pos;
sFound = true;
} else {
endNode = textNodes [j];
endOffset = pos + paramArr [i] .length;
break;
}
}
}
}
console.log（startNode）;
console.log（startOffset）;
console.log（endNode）;
console.log（endOffset）;
var range = document.createRange（）;
range.setStart（startNode，startOffset）;
range.setEnd（endNode，endOffset）;
var sel = window.getSelection（）;
sel.removeAllRanges（）;
sel.addRange（range）;
如果您希望在IE< 9，你需要添加特定于MS的选择代码（噩梦），或者使用Rangy.js（非常重）。
函数visibleTextNodes（）{
var walker = document.createTreeWalker（
document.body，
NodeFilter.SHOW_ALL，
function（node）{
if（node.nodeType == 3）{
return NodeFilter.FILTER_ACCEPT;
} else if（node.offsetWidth&& node.offsetHeight&& node.style.visibility！='hidden'）{
return NodeFilter.FILTER_SKIP;
} else {
return NodeFilter.FILTER_REJECT;
}
}，
false
）; （）;
for（var nodes = []; walker.nextNode（）;）{
nodes.push（walker.currentNode）;
}
返回节点;
}
//找到第一个匹配项，选择并滚动到它。
//不区分大小写的情况。
//为了更好地滚动选择，请参阅https://gist.github.com/3744577
函数高亮（针）{
needle = needle.replace（/ \s / g， ''）.toLowerCase（）;
var textNodes = visibleTextNodes（）; （var i = 0，texts = []; i
}
var matchStart = texts.join（''）。indexOf（needle）;
if（matchStart< 0）{
return false;
var nodeAndOffsetAtPosition = function（position）{
for（var i = 0，consume = 0; consume + texts [i] .length< position; i ++） {
消费+ =文本[i] .length;
var whitespacePrefix = textNodes [i] .nodeValue.match（/ ^ \s * /）[0];
return [textNodes [i]，position - consume + whitespacePrefix.length];
};
var range = document.createRange（）;
range.setStart.apply（range，nodeAndOffsetAtPosition（matchStart））;
range.setEnd.apply（range，nodeAndOffsetAtPosition（matchStart + needle.length））;
window.getSelection（）。removeAllRanges（）;
window.getSelection（）。addRange（range）;
range.startContainer.parentNode.scrollIntoView（）;
}
highlight（'hello world'）;
When I try to pass text which spreads throughout a few block elements the window.find method dosent work:
HTML:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
</head>
<body>
<p>search me</p><b> I could be the answer</b>
</body>
</html>
JavaScript:
window.find("meI could be");
Or:
str = "me";
str+= "\n";
str+="I could be t";
window.find(str);
This happens when the <p> element is present between the search term.
The end result should be a GUI selection on the text in the page, I do not want to search if it exists.
I would like to know how to achieve this in Firefox(at least) and internet explorer.
Note: I can't change the dom (e.g. change to display inline).
Edit:
Here is something I tried after @Alexey Lebedev's comment, but it also finds the script (tag [...] text):
Can I make it more simple? (better)?
function nativeTreeWalker(startNode) {
var walker = document.createTreeWalker(
startNode,
NodeFilter.SHOW_TEXT,
null,
false
);
var node;
var textNodesV = [];
var textNodes = [];
node = walker.nextNode();
while(node ) {
if(node.nodeValue.trim()){
textNodes.push(node);
textNodesV.push(node.nodeValue);
//console.log(node.nodeValue);
}
node = walker.nextNode();
}
return [textNodes,textNodesV];
}
var result = nativeTreeWalker(document.body);
var textNodes = result[0];
var textNodesV = result[1];
var param = " Praragraph.Test 3 Praragr";
paramArr = param.split(/(?=[\S])(?!\s)(?=[\W])(?=[\S])/g);
//Fix split PARAM
for(i=0;i<paramArr.length-1;i++){
paramArr[i]= paramArr[i]+paramArr[i+1].charAt(0);
paramArr[i+1] = paramArr[i+1].substring(1,paramArr[i+1].length);
}
//Fix last element PARAM
if(paramArr[paramArr.length-1] === ""){
paramArr.splice(paramArr.length-1,1);
}
//console.log(paramArr);
var startNode,startOffset,sFound=false,
endNode,endOffset;
for(i=0;i<paramArr.length;i++){
for(j=0;j<textNodesV.length;j++){
//Fully Equal
var pos = textNodesV[j].indexOf(paramArr[i]);
if(pos != -1){
if(!sFound){
startNode = textNodes[j];
startOffset = pos;
sFound=true;
}else{
endNode = textNodes[j];
endOffset = pos+paramArr[i].length;
break;
}
}
}
}
console.log(startNode);
console.log(startOffset);
console.log(endNode);
console.log(endOffset);
var range = document.createRange();
range.setStart(startNode,startOffset);
range.setEnd(endNode,endOffset);
var sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
Note: No jQuery (only Raw JS).
JS Bin demo: http://jsbin.com/aqiciv/1/
If you want this to work in IE < 9 you'll need to add MS-specific selection code (nightmare), or use Rangy.js (pretty heavy).
function visibleTextNodes() {
var walker = document.createTreeWalker(
document.body,
NodeFilter.SHOW_ALL,
function(node) {
if (node.nodeType == 3) {
return NodeFilter.FILTER_ACCEPT;
} else if (node.offsetWidth && node.offsetHeight && node.style.visibility != 'hidden') {
return NodeFilter.FILTER_SKIP;
} else {
return NodeFilter.FILTER_REJECT;
}
},
false
);
for (var nodes = []; walker.nextNode();) {
nodes.push(walker.currentNode);
}
return nodes;
}
// Find the first match, select and scroll to it.
// Case- and whitespace- insensitive.
// For better scrolling to selection see https://gist.github.com/3744577
function highlight(needle) {
needle = needle.replace(/\s/g, '').toLowerCase();
var textNodes = visibleTextNodes();
for (var i = 0, texts = []; i < textNodes.length; i++) {
texts.push(textNodes[i].nodeValue.replace(/\s/g, '').toLowerCase());
}
var matchStart = texts.join('').indexOf(needle);
if (matchStart < 0) {
return false;
}
var nodeAndOffsetAtPosition = function(position) {
for (var i = 0, consumed = 0; consumed + texts[i].length < position; i++) {
consumed += texts[i].length;
}
var whitespacePrefix = textNodes[i].nodeValue.match(/^\s*/)[0];
return [textNodes[i], position - consumed + whitespacePrefix.length];
};
var range = document.createRange();
range.setStart.apply(range, nodeAndOffsetAtPosition(matchStart));
range.setEnd.apply( range, nodeAndOffsetAtPosition(matchStart + needle.length));
window.getSelection().removeAllRanges();
window.getSelection().addRange(range);
range.startContainer.parentNode.scrollIntoView();
}
highlight('hello world');
这篇关于JavaScript window.find（）不选择搜索词的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
